Mouth blowpipe-lamp.



F. J. DAWSON.

MOUTH BLOWPIPE LAMP.

APPucATmN HLED 2.1AY12,19|5.

Patented J 11116 20, 1916.

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THE COLUMNA PLANQUE/WH co., WASHINGTON, D. c.

MOUTH BLGVPIPE-LAMP.

Specication of Letters Patent.

Patented June 20, i916.

Application filed May 12, 1915. Serial No. 27,615.

To all whom t may concern Be it known that l, FRANK J. DAWSON, a citizen of the United States, residing at Piqua, in the county of Miami and State of Ohio, have invented certain new and useful Improvements in Mouth Blowpipe-Lamps; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

One object of this invention is to provide a mouth blowpipe lamp which will be portable, and adapted particularly to be used in the dental profession, for soldering gold crowns for teeth.

Another object is to provide a blowpipe lamp, adapted to burn alcohol, and one in which the units of heat can be increased at will.

Another object is to associate with the blow pipe, a receptacle having compartments therein adapted to receive flux and solder.

With the foregoing and other objects in view this invention consists in such novel features of construction and arrangement of parts that will be hereinafter more fully de scribed, illustrated in the accompanying drawings, and claimed, in which zi Figure 1 is a vertical elevation through the blowpipe lamp. Fig. 2 is a side view' of the wick tube holding means, removed from the lamp. Fig. 3 is a top plan view of the base and the wick tube, showing the same removed from the lamp and also showing the linx and solder compartment formed in the base. Fig. 4C is a sectional Idetail view of the upper end of the wick tube, with the top removed. Fig. 5 is a vertical sectional view of a flame regulating tube adapted to be associated with the wick tube and the closing cap therefor.

Referring more particularly to the drawings, the numeral 1 designates a glass reservoir having a restricted neck 2. Encircling the neck 2 is an annular collar 3 which is arranged in spaced relation with the neck 2 and interposed between the neck and the coll ar is a coating of asbestos or other suitable material t, so that air tight joint may be had between the collar and the neck. The upper edges of the walls of said collar 3 converge as shown at 5 and the terminals of the converging portions are extended inwardly and downwardly to provide an internal threaded flange 6.

Removably associated `with the collar 3 is a tubular base member 7 which is reduced at two points to provide the annular shoulders S and 9, the lower end of the tubular base 7 being threaded and adapted to be inserted within the collar 3 and to have threaded engagement with the internal flange 6 as shown in Fig. 1 of the drawings, the annular shoulder 9 being adapted when the base 7 is applied to the collar 3 to rest' upon the upper edge of the converging portion 5 of said collar. Located within the upper end of the base and secured to the annular shoulder 8, is a disk 11 adapted to define with the upper ends of the walls of the tubular member 7, a chamber, for a-purpose to be hereinafter set forth.

A vertically disposed wick tube 13 has one end extended into the tubular member 7 and through the disk 11 and has its terminal secured in an opening formed in a disk 14 carried by the lower ends of the tubular member 7, the said tube communicating with the interior of the neck 2 of the reservoir and adapted to receive a wick 15 which extends throughout the length of the tube and has itslower end extending into the alcohol reservoir 1.

The chamber 12 .is divided by means of partitions 16 and 17 into a pair of compartments 18 and 19, one of these compartments being adapted to receive flux and the other adapted to receive solder.

Extending transversely through one side of the wick tube 13 is a pipe or tube 2O and located within the tube 13 and lying within the wick 15 is an air tube 21,the upper end of the tube 21 being disposed adjacent the upper end of the wick tube and the lower end be ing attached to the inner end of the tube 20. The outer end of the tube 20 is adapted to be received by one end 22 of a flexible tube 23, the opposite end of the tube 23 being provided with mouth piece 24.

From the foregoing structure it will be seen that when the mouth piece 24: is placed in the mouth of the operator, and a blast of air blown through the flexible tube and the air tube 21, the llame at the upper end of the wick ywill be projected and the number of heat units increased. For increasing and decreasing the volume of flame a slid` ing tube 25 is provided. This tube is carried by the upper end of the wick tube and when it is moved upwardly the volume of the flame will be diminished and when moved downwardly the volume of the flame will be increased. A cap 26 is adapted to.

receive the upper end Vof the wick tube 21, so as to extinguish the flame and prevent foreign mattei' from entering the upper end of the tubewhen the lamp is not in use. The cap is iiexibly secured to the pipe 2O by means of a chain 27, one end of which is secured to a collar 28, which embraces the pipe 20, and the opposite end of the chain is attached to the cap. Y

The sliding tube 25 also forms the guide for ztrimming the` wick l5 and for keeping the upper end thereof, even, so when the tube is moved upwardly before the cap; 26 isl placed in position, it prevents the adjacent end of the wick from spreading when the cap is being placed upon the tube 25, for closing the wick tube when the lamp is not in use, thereby keeping the upper end of the wick in an upright position so as to insure of a vertical Haine when the wick is lighted.

Having thus described my invention, what I claim as new is v l. Ina portable blowpipe lamp having a fuel reservoir provided with a reduced neck, a collar encircling the neck, a tubular base portion having one end reduced and threadably received by the collar and having its opposite enddivided to form chambers, a wick tube extendingy centrally through the chambers, and communicating with the interior of the reservoir and provided withV a wick, means for forcing a blast of air into the interior of the wick tube, said means e entering into the' wick tube and extending upwardly into said tube, and terminating flush Iwith the upper edges of said tube, means secured to the' exterior of the upper end of said wick tube for increasing .or

diminishing the glow of light or flame thereadapted to receive flux or solder therein, a

wick tube extending through the chambers and communicating with the interior of the reservoir and provided with a wick, the upper end of said wick tube being reduced, a sleeve adjustably mounted on the reduced end of said wick tube, a blast tube rextending into 4said wick tube and communicating with the interior thereof above the said tubular base portion, said blast tube extending upwardly into said wick tube and terminating flush with the upper edges of said wick tube, and a cap for closing the open end of said wick tube.

In testimony whereof I affix my signature in presence of two witnesses.

Witnesses:

' CLYDE G. CARR,

EDWARD IV. HIRT.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner o1' Patents,

' Washington', D. C.

FRANK J. DAwsoN. Y 

